Why compress an image at all
Phone cameras have outpaced everything else on the internet. A single snapshot now weighs 3 to 8 MB — fine for printing, wildly oversized for almost every other use. Email providers cap attachments around 25 MB, so a handful of photos bounces back. Government and job-application portals routinely reject any upload over 1 or 2 MB. On a website, every extra megabyte is a slower page and a visitor who gives up. And messaging apps such as WhatsApp recompress whatever you send with aggressive settings of their own; hand them an image you already optimized carefully and the copy that reaches the other side degrades noticeably less.
This tool recompresses JPG, PNG and WebP images entirely inside your browser. The pixel dimensions stay the same — only the file size shrinks. Nothing is ever uploaded to a server: the work happens on your own device, which means you can safely compress ID scans, receipts or personal photos without them touching the internet.
How to use it
- Drag one or more images into the drop area, or click “Choose images”.
- Pick the output format (JPEG or WebP) and set the quality slider.
- Hit “Compress”. Each row shows the original size, the new size and the percentage saved.
- Download files individually, or grab everything at once as a ZIP.
A concrete case
Say you need to email ten photos from a rental-apartment inspection, 4.6 MB each — 46 MB total, twice the attachment limit. Run them through at JPEG quality 75 and each drops to roughly 1 MB, about a 78% reduction, with no visible difference on screen. All ten now fit in a single email with room to spare. Exact numbers vary by image: a busy, detailed photo compresses less than one with large smooth areas like sky or walls.
JPEG vs WebP
JPEG is the universal choice — every device, program and upload form on Earth accepts it. When compatibility matters (official forms, older desktop software, printing shops), use JPEG.
WebP is the efficient choice: at comparable visual quality it typically comes out around 30% smaller than JPEG, and it preserves transparency. Every modern browser displays it natively, making it ideal for websites and chat. Its only drawback is that some older desktop applications still can’t open it.
Picking a quality level
The slider runs from 10 to 95, and the sweet spot sits at 70–80: huge savings, and for most photos the difference from the original is imperceptible on screen. Below 50, blockiness and smeared edges start creeping in, especially around text and sharp lines. Above 90, file size balloons for an improvement your eyes can barely register. The default of 75 is a sensible starting point for nearly everything.
Frequently asked questions
Does compression lose quality?
Yes — honestly, some. JPEG and WebP are lossy formats: they permanently discard visual information the human eye is least likely to miss. At quality 70–80 the loss is essentially invisible on screen, but it cannot be undone, so keep your originals if you plan to print large or edit heavily later.
What happens to a transparent PNG?
JPEG has no concept of transparency, so transparent areas get filled with a white background. If you need to keep transparency — logos, cut-outs, stickers — choose WebP as the output format and it survives intact.
What if the result is bigger than the original?
It happens, typically with small PNGs or images that were already tightly optimized. The tool detects it, flags that row with a warning, and offers you the untouched original instead of a “compressed” file that would actually be larger.
What’s the maximum file size?
Up to 100 MB per file. Since everything runs on your device, the practical ceiling for enormous images is your browser’s memory — regular camera and phone photos are never an issue.
Is it private?
Completely. Compression happens on your own browser’s canvas: your images are never sent, stored or seen by anyone. You can verify it yourself — disconnect from the internet and the tool keeps working.